Shoulderless rocker studs backing out - Team Camaro Tech
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post #1 of 24 (permalink) Old Jun 22nd, 14, 10:14 PM Thread Starter
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David
 
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Shoulderless rocker studs backing out

Like the title says, causing coolant seepage and it's bright green.
I don't quite know how to properly torque them.
I used regular pipe dope on the threads and got them as tight as possible, evidently not tight enough. I could see the stub as turned the rocker nut.

Any tips on torquing ans sealing these.

Thanks
Dave
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post #2 of 24 (permalink) Old Jun 23rd, 14, 06:02 AM
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Re: Shoulderless rocker studs backing out

The rocker studs do not go into any water jacket areas that would require sealing.

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post #3 of 24 (permalink) Old Jun 23rd, 14, 06:47 AM Thread Starter
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Re: Shoulderless rocker studs backing out

96 vortec heads they do from what read.
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post #4 of 24 (permalink) Old Jun 23rd, 14, 07:02 AM
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Re: Shoulderless rocker studs backing out

Hmmm....never heard of a SBC rocker stud going into the water jacket....but I'll assume you've researched it.

By "shoulderless" do you mean that the there are no wrench flats on the stud? If so, double-nut the stud, tightening them against eachother then use the top one to properly torque the stud. Sealant choice is up to you, just make sure it is up to the task. I use Permatex Aviation Form-a-Gasket on head bolts, should work for this as well.


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post #5 of 24 (permalink) Old Jun 23rd, 14, 07:23 AM
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Re: Shoulderless rocker studs backing out

Most every SBC stud I have ever owned went into water jacket.
Permatex #1 works very well as does JB Weld, but, need to drain coolant and clean both parts with BraKleen®.
You're best bet may be installing studs with a hex, as an example ARP studs, and use a copper sealing washer between the head boss and stud flange.

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post #6 of 24 (permalink) Old Jun 23rd, 14, 07:34 AM Thread Starter
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Re: Shoulderless rocker studs backing out

Quote:
Originally Posted by Everett#2390 View Post
Most every SBC stud I have ever owned went into water jacket.
Permatex #1 works very well as does JB Weld, but, need to drain coolant and clean both parts with BraKleen®.
You're best bet may be installing studs with a hex, as an example ARP studs, and use a copper sealing washer between the head boss and stud flange.
I have bought some hex studs but they raise the fulcrum I would need longer rods. That's why I stayed with the shoulderless studs.

In your opinion without machining do you think I should use the hex and get new rods.
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post #7 of 24 (permalink) Old Jun 23rd, 14, 07:37 AM Thread Starter
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Re: Shoulderless rocker studs backing out

Quote:
Originally Posted by BPOS View Post
Hmmm....never heard of a SBC rocker stud going into the water jacket....but I'll assume you've researched it.

By "shoulderless" do you mean that the there are no wrench flats on the stud? If so, double-nut the stud, tightening them against eachother then use the top one to properly torque the stud. Sealant choice is up to you, just make sure it is up to the task. I use Permatex Aviation Form-a-Gasket on head bolts, should work for this as well.
Thanks I was wondering how that worked. I think my problem is they're not torqued like the should be. I'm going to go through each one and make sure it's done right this time.
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post #8 of 24 (permalink) Old Jun 23rd, 14, 08:15 AM
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Re: Shoulderless rocker studs backing out

Quote:
Originally Posted by Everett#2390 View Post
Most every SBC stud I have ever owned went into water jacket.
Permatex #1 works very well as does JB Weld, but, need to drain coolant and clean both parts with BraKleen®.
You're best bet may be installing studs with a hex, as an example ARP studs, and use a copper sealing washer between the head boss and stud flange.
I have never used sealer on rocker studs for SBC or BBC and I have never had a coolant leak

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post #9 of 24 (permalink) Old Jun 23rd, 14, 10:43 AM
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Re: Shoulderless rocker studs backing out

Oh oh, battle of the Moderators.

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post #10 of 24 (permalink) Old Jun 23rd, 14, 11:22 AM
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Re: Shoulderless rocker studs backing out

Quote:
Originally Posted by Vega$69 View Post
I have never used sealer on rocker studs for SBC or BBC and I have never had a coolant leak

I tend to agree
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post #11 of 24 (permalink) Old Jun 23rd, 14, 12:43 PM
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Re: Shoulderless rocker studs backing out

When one of the pressed studs on my original '69 441 heads pulled out it filled the engine with water. The machine shop that cut them for screw in studs used what appeard to be some type of epoxy to seal them. AFR studs for sure go into the water jacket, says right in the instructions to seal them.

You have to double-nut the shoulderless ones to torque them to around 35 lb ft.

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post #12 of 24 (permalink) Old Jun 23rd, 14, 02:05 PM
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Re: Shoulderless rocker studs backing out

No one ever hear of Locktite?

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post #13 of 24 (permalink) Old Jun 23rd, 14, 04:13 PM
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Re: Shoulderless rocker studs backing out

Quote:
Originally Posted by Steiner View Post
. AFR studs for sure go into the water jacket, says right in the instructions to seal them.
You sure on that? I've had some aftermarket heads - no AFRs though - and have seen on all of them where the holes for the intake studs are drilled through to the intake port and require sealant to keep from sucking oil under vacuum, but never a rocker stud drilled into the water jacket.

Of course the OP has Vortec heads and I'm not familiar with them.

Head bolts are a different story - all 17 per side go into the water jacket - I've heard that on the GM Bowtie blocks the top row is blind though.

Regarding hex studs "changing the fulcrum" and requiring longer pushrods - no. The only potential problem I see there is that if the new stud isn't threaded down far enough you won't be able to adjust the valves, and if that's the case a longer pushrod certainly isn't the answer.


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post #14 of 24 (permalink) Old Jun 23rd, 14, 05:03 PM
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Re: Shoulderless rocker studs backing out

Yep, Al. Andy that used to post here had his leak since his builder didn't see it in the notes. AFR ships them with the guideplates and studs installed, along with instructions to take them out and seal them. Why in the hell they install them for shipping is a mystery to me.

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post #15 of 24 (permalink) Old Jun 24th, 14, 01:38 AM
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Re: Shoulderless rocker studs backing out

Quote:
Originally Posted by BPOS View Post
You sure on that?
I'm with all the others.

I've never heard of this.

Glad I don't deal with smallblocks.

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